One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,8)(5,7)(9,10,12,14)(11,15,16,13)(17,18,23,20)(19,26,30,32)(21,25,22,31)(24,28,27,29)(1,2,6,3)(4,7,5,8)(9,11,12,16)(10,13,14,15)(17,18,23,20)(19,27,30,24)(21,31,22,25)(26,29,32,28)(1,3,6,2)(4,7,5,8)(11,16)(13,15)(17,19,22,29,23,30,21,28)(18,24,25,26,20,27,31,32)(1,4,6,5)(2,7,3,8)(10,14)(13,15)(17,20,23,18)(19,24,30,27)(21,25,22,31)(26,28,32,29)(1,5,6,4)(2,7,3,8)(17,21,23,22)(18,25,20,31)(19,28,30,29)(24,26,27,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.